GeeksforGeeks
geeksforgeeks.org › python › handling-nameerror-exception-in-python
Handling NameError Exception in Python - GeeksforGeeks
July 1, 2026 - A NameError occurs when Python cannot find a variable, function, or identifier that is being referenced in the program. This usually happens when a name is misspelled, used before being defined or accessed outside its valid scope. ... ERROR!
Real Python
realpython.com › ref › builtin-exceptions › nameerror
NameError | Python’s Built-in Exceptions – Real Python
NameError is a built-in exception that occurs when you try to use a variable or function name that isn’t defined yet.
python - What is this NameError and how do I fix it? - Stack Overflow
Why do I get "NameError: name '...' ... (in Python 2.x)? (15 answers) Closed 4 years ago. I am having difficulty understanding the concept in my book. I tried the coding example the book told me to try, but I get this NameError that I do not understand why it is an error... More on stackoverflow.com
NameError: name 'name' is not defined
Hello, I'm a Reddit bot who's here to help people nicely format their coding questions. This makes it as easy as possible for people to read your post and help you. I think I have detected some formatting issues with your submission: Python code found in submission text that's not formatted as code. If I am correct, please edit the text in your post and try to follow these instructions to fix up your post's formatting. Am I misbehaving? Have a comment or suggestion? Reply to this comment or raise an issue here . More on reddit.com
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July 24, 2022NameError when variable has been defined
Stop using global variables and just pass your data using arguments and returns. That should fix it. More on reddit.com
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May 30, 2023File path name giving a syntax error in python when trying to follow ATBS chapter 6
Programming in Windows is a bit weird. Try just launching a command prompt window, and giving it these commands: cd E: python "HDD Programs\Python 3\MyPythonScripts\pw.py" More on reddit.com
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April 8, 2018How to solve undefined variable in python
To solve the NameError: name 'x' is not defined error in Python, you need to make sure that the variable is properly defined and assigned a value before it is used. The variable should also be referenced correctly, with the correct case and spelling.
rollbar.com
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NameError: name 'x' is not defined in Python
What causes undefined variable?
In Python, a variable is not created until a value is assigned to it. If an attempt is made to use a variable before it is defined, a NameError: name 'x' is not defined error is thrown. The error message typically includes the name of the variable that is causing the problem and the line of code where the error occurred.
rollbar.com
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NameError: name 'x' is not defined in Python
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W3Schools
w3schools.com › python › ref_exception_nameerror.asp
Python NameError Exception
Python Examples Python Compiler ... Plan Python Interview Q&A Python Training ... The NameError exception occurs if you use a variable that is not defined....
Stack Overflow
stackoverflow.com › questions › 73536966 › what-is-this-nameerror-and-how-do-i-fix-it
python - What is this NameError and how do I fix it? - Stack Overflow
CopyFile "/Users/eric/Python Notes/Notes.py", line 1, in <module> name = input('What is your name?\n') File "<string>", line 1, in <module> NameError: name 'eric' is not defined · Edit: Thank you everyone who helped me understand this error. By default, Geany and VSCode were using Python2 as my interpreter.
EDUCBA
educba.com › home › software development › software development tutorials › python tutorial › python nameerror
Python NameError | How NameError Works in Python with Examples
January 8, 2024 - NameError is a kind of error in Python that occurs when executing a function, variable, library, or string without quotes that have been typed in the code without any previous Declaration.
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Carleton University
cs.carleton.edu › cs_comps › 1213 › pylearn › final_results › encyclopedia › nameError.html
Error Encyclopedia | Name Error
Although technically both of these variable names will work just fine, one is significantly more intuitive for organizing and understanding your code. NameError exceptions in Python are generally raised when you try to access a variable that you have not defined properly.
Medium
medium.com › @rayancrazer › name-error-in-python-69393dbeec04
Fixing NameError in Python: A Simple Guide | Medium
November 24, 2024 - NameError is a common type of error that you may encounter while working with Python. This error occurs when you try to use a variable or function name that has not been defined yet or is out of scope.
Rollbar
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NameError: name 'x' is not defined in Python
A Python NameError is raised when the program attempts to use a variable that has not been defined. Learn how to fix it.
Published: May 16, 2023
ScienceDirect
sciencedirect.com › science › article › abs › pii › S0950584924001976
Detecting and Explaining Python Name Errors - ScienceDirect
October 11, 2024 - Among many of the issues impacting the reliability of Python projects, NameError is one of the most popular issues that will be thrown if a given name (e.g., of a variable or a method) cannot be correctly interpreted by Python.
Altcademy
altcademy.com › blog › what-is-a-name-error-in-python
What is a name error in Python - Altcademy.com
March 6, 2024 - Similarly, a NameError in Python occurs when you try to use a name (usually a variable or a function name) that Python doesn't recognize. In technical terms, this error is raised when your code refers to a name that hasn't been defined yet.
Python Principles
pythonprinciples.com › blog › name-errors
Name Errors – Python Principles
The x in the error will vary depending on your program. The error means that Python looks for something named x but finds nothing defined by that name.
CodeRivers
coderivers.org › blog › python-name-error
Understanding and Handling Python Name Error - CodeRivers
February 22, 2026 - A NameError is raised when Python cannot find a name in any of the scopes it searches. For example: ... When a NameError occurs, the error message provides valuable information. The error message tells you the name that was not found and the line number where the error occurred.
CodeRivers
coderivers.org › blog › name-error-python
Understanding Name Error in Python - CodeRivers
January 23, 2025 - By the end of this post, you'll have a solid understanding of NameError and be better equipped to write error - free Python code. ... In Python, a NameError is raised when the interpreter encounters a name (such as a variable, function, or class name) that it cannot resolve.
Career Karma
careerkarma.com › blog › python › python nameerror name is not defined solution
Python nameerror name is not defined Solution | Career Karma
December 1, 2023 - In this guide, we’re going to ... a few example solutions to this error to help you understand how to resolve it in your code. A NameError is raised when you try to use a variable or a function name that is not valid. In Python, code runs ...
PyTutorial
pytutorial.com › understanding-nameerror-in-python
PyTutorial | Understanding NameError in Python
February 23, 2025 - A NameError in Python occurs when the interpreter encounters a name that it doesn't recognize. This usually happens when you try to use a variable or function that hasn't been defined yet.
YouTube
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Python NameError — What it is and how to fix it - YouTube
NameError: name '***' is not definedWhat is a NameError in Python? What can you do to fix it? When does it happen?All these questions are answered in this vi...
Published: August 19, 2024
CodeRivers
coderivers.org › blog › nameerror-in-python
Understanding `NameError` in Python - CodeRivers
February 22, 2026 - By the end of this post, you'll have a comprehensive understanding of NameError and be better equipped to write error-free Python code. ... In Python, a NameError is an exception that occurs when the interpreter tries to access a variable, function, or module that has not been defined.
OpenPython
openpython.org › home › articles › fix python nameerror: 'name is not defined' (step-by-step)
Fix Python NameError: 'Name Is Not Defined' (Step-by-Step) | OpenPython
May 30, 2026 - Python's NameError: name 'x' is not defined is one of those errors that every developer has seen. It means Python looked for a name — a variable, function, or imported module — and could not find it anywhere in scope.
LabEx
labex.io › tutorials › python-how-to-resolve-nameerror-in-python-417444
How to resolve NameError in Python | LabEx
NameError is a common exception that occurs in Python when a name (variable, function, or module) is not defined or is not accessible in the current scope. This error typically arises when you try to use a name that has not been assigned a value ...
Quora
quora.com › How-do-I-resolve-a-name-error-in-Python
How to resolve a name error in Python - Quora
Answer (1 of 8): NameErrors are one of the most common types of Python errors. When you’re first getting started, these errors can seem intimidating. They’re not too complicated. A NameError means that you’ve tried to use a variable that does not yet exist. What is a NameError?